The G5 auto bid
The PAC-12 auto bid
The ACC auto bid
And 4th place SEC or 3rd place Big Ten team
That's a tall order
There's quite a gap between the 4th and 5th place teams in the SEC with the Top 4 being very tough. (Alabama, Georgia, TAMU and Florida) We'd need TAMU to start to decline.
Then we'd have to stay above the 3rd Big Ten team between OSU, PSU, Wisconsin and Michigan.
I don't think two Big 12 teams are getting in so we don't have to worry about them.